Connection on Terminal Units TU509 or TU510¶
The assignment of the 9-pole female D-SUB connector for the PROFIBUSâ signals:
| 1 | — | Reserved | |
| 2 | — | Reserved | |
| 3 | B | Data line B (receive and send line, positive) | |
| 4 | — | Reserved | |
| 5 | DGND | Reference potential for data transmissions and +5 V | |
| 6 | VP (5 V) |
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| 7 | — | Reserved | |
| 8 | A | Data line A (receive and send line, negative) | |
| 9 | — | Reserved | |
| Shield | Shield | Shield, functional earth |